Update multiple table column values using single query

Question

How would you update data in multiple tables using a single query?

MySQL Example

The equivalent code in MySQL:

UPDATE party p
LEF         


        

Answer 1

You could use Oracle MERGE statement to do this. It is a bulk update-or-insert kind of statement based on joining the target table with an inline view.

MERGE INTO bonuses D
   USING (
      SELECT employee_id, salary, department_id FROM employees
      WHERE department_id = 80
   ) S ON (D.employee_id = S.employee_id)
 WHEN MATCHED THEN 
   UPDATE SET D.bonus = D.bonus + S.salary*.01
 WHEN NOT MATCHED THEN 
   INSERT (D.employee_id, D.bonus)
   VALUES (S.employee_id, S.salary*0.1);

if you do not need the insert part, you just omit the last 3 lines above.